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Insulin Glargine

Insulin Glargine is a long-acting form of insulin used to help control blood sugar levels in adults. It is often prescribed for individuals with diabetes who require steady blood sugar management.

Typically, it is used in conjunction with a proper diet and exercise regimen to improve blood sugar control.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Insulin Glargine Brands

Insulin Glargine

Strengths 100 IU

Insulin Glargine Uses

Insulin Glargine is primarily used to manage blood sugar levels in people with diabetes. It helps maintain stable blood sugar levels over the course of a day.

Type 1 diabetes management
Type 2 diabetes management
Prevention of complications associated with diabetes
Long-term blood sugar control

How Insulin Glargine Works

Insulin Glargine works by mimicking the natural hormone insulin, which helps glucose enter cells to be used for energy. It is designed to release insulin slowly and steadily over time.

This long-acting insulin helps to maintain a consistent level of insulin in the body, reducing the risk of blood sugar spikes and drops.

Common side effects of Insulin Glargine

Not everyone will experience side effects from Insulin Glargine, and many of them are mild and temporary. However, it is important to be aware of them.

Low blood sugar (hypoglycemia)
Injection site reactions
Weight gain
Swelling in the hands or feet
Skin thickening at the injection site
Allergic reactions

If you experience serious or persistent symptoms, contact your healthcare provider.

Regularly monitor your blood sugar levels as advised by your healthcare provider.
Avoid consuming large amounts of alcohol, as it can affect blood sugar control.
Rotate your injection sites to reduce the risk of skin reactions.
Inform your doctor about any other medications you are taking to avoid potential interactions.
Do not use Insulin Glargine if you experience severe low blood sugar episodes.

Always consult your doctor for personalized medical advice.

Frequently Asked Questions

How does Insulin Glargine help in diabetes?

Insulin Glargine helps control blood sugar levels by providing a steady release of insulin throughout the day.

When does Insulin Glargine start working?

Insulin Glargine typically begins to work within a few hours after injection, providing long-lasting blood sugar control.

Can Insulin Glargine be used with other diabetes medications?

Yes, it is often used with other diabetes medications, but always under the guidance of a healthcare provider.

What should I do if I miss a dose?

If you miss a dose, contact your healthcare provider for advice on what to do next.

Are there any dietary restrictions while using Insulin Glargine?

While there are no strict dietary restrictions, maintaining a balanced diet is important for managing diabetes effectively.